Steel tower.



WITNESSES:

R. L. ALLEN.

STEEL TOWER.

APPLICATION FILED 11150.13, 1910.

Patented Oct 28,1913.

ATTORNEYS UNITED STATES. PATENT OFFICE.

ROBERT -Iu- ALLEN, -OE :SYRACUSE, NEW YORK; v.ASSIGNOR TO -ARGHBOLD-BRADY: COMPANY, OF SYRACUSE; EW YORK, .A .CORBORAHJION-DF-FNEWNYORKF- STEEL TOWER.

specification of Letters Patent. P-fitnted 0e13, 28,1913.

Aplflicatimr flledriDeoemben 13; 19mm Serial- Nos 5972040).

To all whomc'tm'ay concern:

Be-it knownthat: 1, Rrinmr L. ALLEN, of Syracuse,- in the -county of Onondaga and State of New=Yorln-havednventeda certain: new anduseful Steel =Tower, of which {the following :is-a specification This invention -has for its-object a particularly light and strong steel tower for supporting 1 electric transmissionncables -:andthe like; and it consists :in thecombi-nations. and constructions hereinafter sen-forth and claimed Tn describing'ithis: invention rrefenence is. had-to the accompanying drawing .in wh ch like characters designatecorresponding; parts in all the-views.

Figure l is: an elevation of 'thistower partly broken'awa Fig.2 is a fragmen tary view illustratmgthe mannerof placing the frame of the tower inupright position. Fig. 3 is a detail:lview illustratmg the connect-ion betweenione of the struts and the main membersof the -frame.-- Fig. 4 is a detail view illustrating the connection between another oflthe=struts and the main members of the frame.

The tower here illustrated is-whatr is known as an A-tower and comprises a base and a frame mounted on the base 1, 1 are stubs constituting the base and designed to be embedded in the ground with their upper ends projecting above thesurface of the ground, the stubs having anchors 2 at their lower ends. These stubs are formed of channel iron and are arranged with their channels facing in opposite directions, the channels being here shown as facing inwardly toward each other, so that the backs 3 or outer surfaces of the webs of the channel irons face outwardly.

The frame comprises side or main members 1, struts 5, 6 extending between the side members and diagonal members 7 connecting the struts. The side members 1 of the frame are formed of channel iron arranged with their channels facing in the opposite directions to the directions in which the channels of the stubs 1 face, said members being here shown as arranged with their channels facing outwardly in order that their lower ends may lap the upper ends of the stubs 1, and be arranged back to back therewith, and hinged thereto by fastening members 8 passed transversely through the. lapping portions of the stubs 1,

and: the side-:members as hereinafter err-- plained:

Heretofore, owing-to the arrangement of the: stubs and the side members of the tower, it hasibt-zennecessary to lift the frame and dropithesame'into upright position, as the side members 1 of the frame were usually fitted. intotho channels of the stubs or viceversa; By my invention owing -to the fact that the channel irons of the frame and stubsere arranged backto back, the frame can:be:laid on the ground and one fastening member 8 passed.- through the lappingportions of each side-member and stub, as illustrated in F lg. 52, and the frame swung about such fastening members as pivots until in upright position, when the remaining fasteningmembers 8 are placed in position to hold theframe upright.

The struts 5 are usually formed of angle iron Vsshaped in cross section, subh struts having their end sections flattened, asat 9, and the extreme end portion 10 of each flattenedsection being bent at an angle to the remaining part of such flattened section 9, and secured by rivets or other means to the web of the contiguous main member 4. The diagonal members 7 include clevises 11 which are pivoted at 12 to the flattened sections 9. Owing to the fact that the portions 10 at the ends of the struts 4 extend only in one direction from the flattened portions 9, the frame has a tendency to twist, and in order to offset such tendency, one or more struts are constructed and arranged to resist such twisting tendency. As here shown the lower strut 6 is arranged to resist the twisting tendency of the frame, and it consists of angle iron members L-shape in cross section which are joined to the side members of the tower by brackets 13. The angle iron members are arranged with corresponding flanges 1a extendlng horizontally, and the other flanges 15 extending upwardly or vertically, the flanges 15 being arranged back to back. The ends of the horizontalflanges 14.- are secured as by rivets 16 to the horizontal flanges of the brackets 13. Each bracket is composed of L-shaped angle iron, one flange of which is riveted or otherwise secured to the back of the contiguous channel iron side element 4 and the other flange of which serves as a shelf supporting the contiguous ends of the members of the strut 6. The clevises 11 of the diagonal members 7 secured to the strut 6 embrace the vertical flanges 15 of the angle ironsof such strut 6 and are connected thereto by pivots 17 extending transversely through said flanges 15.

What I claim is: t

1. In an A-tower, side members, struts between the side meinbers, one of such struts comprising L-shape angle ironmembers arranged with corresponding flanges extending horizontally and their other flanges extending vertically and back to back," and brackets for supporting the ends of said angle iron members and connecting the same to the side members, each bracket being formed of angle iron and having one flange thereof secured to one of the side members and the other flange secured to the horizontal flanges of the angle iron members of the struts, substantially as and for the purpose described.

2. In an A-tower, side members formed of channel iron having their channels facing outwardly, struts extending between the side members, d'agonal members connecting the ends of the struts, one of the struts comprising L-shaped angle iron members arranged with corresponding flanges extending horizontally in opposite directions and their other flanges extending upwardly and arranged back to back, brackets for supporting the ends of the struts and connecting the same to the side members of the tower, each bracket being formed of angle iron and having one flange thereof engaging the back of the contiguous side member and secured thereto, and the other flange serving as a shelf for supporting the contiguous ends of the horizontal flanges of the anglg iron members of the strut, and

fastening pose specified. V

3. In an A-tower, side members formed of channel iron having their channels facing outwardly, struts extending between the side members, diagonal members connecting the ends of the struts, one of the struts comprising L-shaped angle iron members arranged with corresponding flanges extending horizontally in opposite directions and their other flanges extending upwardly and arback, brackets for supportranged back to ing the ends of said one of the struts and connecting the same to the side members of the tower, each bracket being formed of angle iron and having one flange thereof engaging the back of the contiguous side member and secured thereto, and the other flange serving as a shelf for supporting thecontiguous ends of the horizontal flanges of the angle iron members of the strut, and fastening members passing through the horizontal flanges of the members of the strut and the brackets, the diagonal members including clevises pivoted to the vertical flanges of the angle iron members of the strut near the ends of the strut, substantially as and for the purpose set forth.

In testimony whereof, I have hereunto signed my name in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 9th day of December, 1910.

ROBERT L. ALLEN. Witnesses:

L. M. DAVIS, S. DAVIS.

members passing through the 40 horizontal. flanges of the struts and the brackets, substantially as and for the pur- 

